A new methodology for the highly efficient and atom‐economic oxidation of alcohols and benzylic compounds to the corresponding aldehydes and ketones with environmental‐friendly hydrogen peroxide using a magnetic MOF nanocatalyst has been developed. We demonstrated that the resulting magnetic nanocomposite CoFe2O4@SiO2@MIL‐53(Fe) can show excellent catalytic performances in the highly selective oxidation at room temperature, based on a synergetic effect between iron sites and CoFe2O4@SiO2. The nanocatalyst offers simple operation for recovery and the recycling test showed that it could be reused for successive runs without significant degradation in catalytic activity.
Catalytic oxidation of organic sulfides is of considerable significance in industrial chemistry and fuel industry. Therefore, numerous methods have been developed for the oxidation. Metal-containing ionic liquid-based catalysts can catalyze the selective oxidation reactions and are highly used in chemical processes, which have also been used as effective solvents, reaction media, extractants, and catalysts for the oxidation of organic sulfides including oxidative desulfurization of fuel oil. Recently, much attention is being drawn to the preparation of heterogenous catalysts based on the immobilization of metal- or nonmetal-containing ILs on diverse solid supports, which can be easily separated after the completion reaction and recycled. Therefore, there is still an increasing interest in developing new and efficient catalytic procedures for the oxidation of organic sulfides. In this review, we have outlined the recent advances in catalytic oxidation of organic sulfides including oxidative desulfurization of fuel oil. The versatilities and adaptabilities of metal–ionic liquid catalytic systems in the selective oxidation of sulfides are considered a powerful research field in these transformations.
Periodic mesoporous organosilica (PMO) supported ionic liquids with high catalytic ability were prepared and tested in synthesis of 2-oxazolidinones from the three-component cycloaddition reactions of CO 2 , aryl amines and epoxide. The functionalized PMO material PMO@TZ-ILSmCl 4 revealed the most excellent catalytic performance than PMO@TZ-ILLaCl 4 during the catalytic synthesis of 2-oxazolidinones. Different parameters such as catalyst loading, temperature, CO 2 pressure and reaction time were also investigated. Good to excellent yields for 2-oxazolidinones and stable reusability were reached in the CO 2 cycloaddition under solvent-/ligand-free conditions. This work provides a useful route to design novel and highly efficient catalytic systems for the transformation of CO 2 into other valuable 2-oxazolidinones.
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